Bowling Economy Calculator: Formula and Example

A bowling economy calculator works out how many runs a bowler concedes per over, using the runs charged to the bowler and the overs bowled. Enter those two figures to get the economy rate in runs per over, a standard way to compare bowling figures in cricket.

Formula

Economy rate = runs conceded ÷ overs bowled. In symbols, E = R ÷ O, where E is the bowling economy rate in runs per over, R is the number of runs charged to the bowler, and O is the number of overs bowled. The calculator also shows an estimated legal-ball count, using six legal deliveries per over.

Use the actual number of overs as a decimal value: for example, 4 overs and 2 balls is 4⅓ overs, not 4.2 overs. The second output is calculated directly from the overs input, so enter a decimal number of overs if you want that estimate to represent the delivery count accurately.

Worked Example

With the calculator’s defaults, the bowler concedes 24 runs and bowls 4 overs.

1. Divide runs conceded by overs: 24 ÷ 4 = 6.
2. The economy rate is 6.00 runs per over.
3. Estimate legal balls: 4 × 6 = 24 balls.

The displayed rate is rounded to two decimal places. Here the calculation is exact, so rounding does not change the result.

What Bowling Economy Measures

In cricket, bowling economy—often called economy rate or simply economy—is the average number of runs a bowler concedes for each over. A lower figure means fewer runs were conceded per over during the spell. It is a measure of run control, not a complete measure of bowling performance: wickets, match situation, pitch, opposition, and the type of runs conceded all matter too.

The runs in the calculation are those charged to the bowler under the applicable scorekeeping rules. Runs scored from a batter’s shot and many runs from wides or no-balls are charged to the bowler. Byes and leg-byes are generally recorded as extras against the team rather than runs conceded by the bowler. For a specific scorecard, use its bowler figures rather than adding every team extra yourself.

Economy rate is not the same as a bowling average or strike rate. Bowling average is runs conceded per wicket, while bowling strike rate is balls bowled per wicket. Economy describes runs per over; it does not directly say how often a bowler takes wickets.

How to Enter Overs Correctly

Cricket notation can be confusing because overs and balls are not written as ordinary decimal numbers. A figure such as 7.3 in a scorecard usually means seven overs and three balls—not 7.3 decimal overs. Since an over has six legal balls, convert the balls into a fraction of an over before dividing:

• 7 overs and 3 balls = 7 + 3/6 = 7.5 overs.
• 7 overs and 5 balls = 7 + 5/6 ≈ 7.8333 overs.
• 7.3 overs entered as a decimal would mean 7 overs and 1.8 balls, which is not a valid over notation.

For the calculator’s overs field, enter the decimal equivalent: 7.5 for seven overs and three balls. Alternatively, if you are working from total legal balls, divide the ball count by six to find overs. A wide or no-ball does not count as a legal delivery, so a bowler may deliver more than six physical balls in an over.

When to Use the Result and Its Limits

Use the calculator to check a scorecard, compare spells, or follow changes in a bowler’s rate across an innings. Make sure the runs and overs refer to the same spell or innings. For a career or tournament figure, calculate from the combined runs conceded and combined overs—not by taking a simple average of the displayed economy rates for each match. Spells of different lengths should not receive equal weight in that simple average.

Economy rates are commonly shown to two decimal places, but the displayed figure is a rounded summary. If you need an exact comparison, retain the underlying runs and balls until the final calculation. Also keep the context in mind: a bowler defending a small total may be judged differently from one bowling during an aggressive scoring period, even if their economy rates match.

The calculator assumes the overs value is already a true decimal number. Its legal-ball output multiplies that decimal by six; this is useful when the input is an exact multiple of one-sixth, but decimal rounding can make the estimated ball count slightly imperfect. For a scorecard entry such as 4.2 (four overs and two balls), first convert it to 4⅓ overs; the exact legal-ball count is 26, not 25.2.

Frequently Asked Questions

What is a good bowling economy rate?
There is no single rate that is good in every format or situation. Scoring conditions, innings, role, opposition, and match circumstances affect what counts as economical. Compare like with like and consider wickets and other bowling figures as well.

How do you calculate bowling economy?
Divide the runs charged to the bowler by the overs bowled. For example, 30 runs in 5 overs gives 30 ÷ 5 = 6 runs per over.

Does a wide count in the bowler’s economy?
Runs from a wide are generally charged to the bowler, but the wide does not count as a legal ball. Use the bowler’s scorecard figures when calculating an actual rate.

Do byes and leg-byes count as runs conceded?
They are generally recorded as team extras, not charged to the bowler. Do not include them as bowler-conceded runs when using the formula.

How do I convert 4.2 overs to a decimal?
In cricket notation, 4.2 means four overs and two balls. Convert it to 4 + 2/6, or approximately 4.3333 decimal overs; do not enter 4.2 as a decimal.

Can economy rate be calculated when no overs were bowled?
No. Division by zero is undefined. A bowler who has not bowled any overs has no economy rate for that spell.

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in r | Runs conceded | runs | 24 | 0
in o | Overs bowled | overs | 4 | 0
out economy | Bowling economy rate | runs/over | r / o | 2
out balls | Legal balls bowled | balls | o * 6 | 0